Ember is another Skylander for whom it's hard for me to call either path a "favorite". However, I'm going to definitely say Samurai Combo. Inner fire isn't enough to fix what's wrong with Ember, but getting a damage output bonus in relation to how much health you've lost is definitely helpful, because of 3 things:

1) Ember's damage output with her Attack 1 dual-edged weapon swings is really low in relation to what it needs to be on higher difficulty settings.
2) Ember is definitely going to get hurt (A LOT...).
3) This is highly compatible with her soul gem, which stops her from being defeated once per level and leaves her at very low HP instead, in addition to (more so) the 10 seconds of invincibility you'll benefit from more if you have inner fire.

I've not played her but if I had to go with a particular style, it'd be the Living Bomb style as I'm a fan of AoE attacks and damage-over-time. I'd also play her listening to KIX's She dropped me the bomb, because why not?

Ember is another Skylander for whom it's hard for me to call either path a "favorite". However, I'm going to definitely say Samurai Combo. Inner fire isn't enough to fix what's wrong with Ember, but getting a damage output bonus in relation to how much health you've lost is definitely helpful, because of 3 things:

1) Ember's damage output with her Attack 1 dual-edged weapon swings is really low in relation to what it needs to be on higher difficulty settings.
2) Ember is definitely going to get hurt (A LOT...).
3) This is highly compatible with her soul gem, which stops her from being defeated once per level and leaves her at very low HP instead, in addition to (more so) the 10 seconds of invincibility you'll benefit from more if you have inner fire.

^This, basically. I don't have her but I'm planning to buy her eventually, and I'll choose the combo path based on the same statements.